(9-x)^{0.5} = √(9-x)
(9-x)^{1.5} = (9-x)^1*(9-x)^{0.5} = (9-x)*√(9-x)
Nun zwei Brüche addieren.
-18(9-x)^{0.5} + 2/3 * (9-x)^{1.5}
= -18(√(9-x)) + (2(9-x)√(9-x))/3
= (-54(√(9-x)) + 2(9-x)√(9-x))/3
= ( (-54 + 2(9-x))√(9-x))/3
=((-54 + 18 -2x)(√(9-x))/3
=((-36-2x)√(9-x))/3
= ((-2)(18+x)√(9-x))/3
= - (2(18+x)√(9-x))/3